before one week I checked my backlinks in webmaster tools was 90 and suddenly there iis only one..how? plz reply
Because THEY can. THEY can just delete your link or edit it.. If you paid for these, you got scammed...
links are only one way type, and I didn't purchase any links. The web development projects which are completed we given our links to their websites.
Wow, what a load of rubbish suggestions!! Firstly, GWT shows nofollow links as well, just check them if you don't believe it. Secondly, checking your links with ahrefs or anyone else is meaningless because Google only counts the links that Google finds. Hasn't anyone who's commented looked at their own links in GWT over the last few weeks? Many of mine have gone too, it doesn't mean they aren't there any more just that Google isn't counting them any more.
it may be posiable that your back link URL having not found error... i suggest you to wait for next index by google...
What we don't know (and perhaps the OP can answer) is whether the links were all from the same domain. If that's the case then it is quite possible that when Google crawled that site there was a problem and it couldn't locate the links. But if they are from multiple domains it is unlikely that they would all have a problem.
Dear whenever any person resolved 301 redirection and did not remove 2nd domain due to this reason back-links disappear
If they feel like its spam or it doesnt naturally belong there, they can delete it. Ive got fiverr gigs done for me, and lots of backlinks didnt exist. but was no biggy. because I knew some of those links may not stick.
maybe it has something to do with google killing lots and lots of backlinks that appear to them spammy lately? 700,000 websites got penalized for 'manipulating' search results in last 2 months alone